Employee Benefit Plans Projected Benefit Obligation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 87,177,000
Fair value of plan assets at end of year	94,115,000	$ 87,177,000
Pension Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year	92,292,000	86,204,000
Interest cost	2,244,000	2,726,000	$ 3,257,000
Benefit payments	(4,272,000)	(4,104,000)
Change in assumptions	(2,613,000)	7,532,000
Experience gain	(121,000)	(66,000)
Projected benefit obligation at end of year	87,530,000	92,292,000	86,204,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	87,177,000	83,676,000
Actual return on plan assets	11,210,000	7,605,000
Fair value of plan assets at end of year	94,115,000	87,177,000	83,676,000
Other Postretirement Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year	1,322,000	1,450,000
Interest cost	32,000	43,000	61,000
Benefit payments	(167,000)	(177,000)
Change in assumptions	(14,000)	38,000
Experience gain	(71,000)	32,000
Projected benefit obligation at end of year	1,244,000	1,322,000	$ 1,450,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0
Fair value of plan assets at end of year	$ 0	$ 0